CVE-2026-97955net: mana: restore the XDP program pointer when pre-allocation fails
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net: mana: restore the XDP program pointer when pre-allocation fails mana_xdp_set() publishes the new program into apc->bpf_prog before it allocates anything, because mana_pre_alloc_rxbufs() sizes the buffers from it via mana_get_rxbuf_cfg(). When that allocation fails the function returns the error directly, skipping the err_dealloc_rxbuffs label which is the only place that restores the previous pointer. The attach is reported as failed, so the BPF core drops the reference it held for the caller and the program can be freed, while apc->bpf_prog still points at it. The next consumer of mana_xdp_get() - typically mana_chn_setxdp() from mana_alloc_queues() on the following ifup, or after a TX timeout reset - then calls bpf_prog_add() on freed memory. This is reachable from an ordinary "ip link set dev ethX xdp obj ..." whenever the per-queue RX buffer pre-allocation cannot be satisfied. Restore the previous program on that error path.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 730ff06d3f5cc2ce0348414b78c10528b767d4a3 builds before 5b3cdc9abd82b7e49e0f1a21d6eb75466c5ecef8; from 730ff06d3f5cc2ce0348414b78c10528b767d4a3 before 9801edfba8dfcdb1da3b0afccdf143e13d646b56; 730ff06d3f5cc2ce0348414b78c10528b767d4a3 builds before 4c46beb807efcc93f5899ebe1f5958248eb296c6 | CNA record |
References
- https://git.kernel.org/stable/c/5b3cdc9abd82b7e49e0f1a21d6eb75466c5ecef8
- https://git.kernel.org/stable/c/9801edfba8dfcdb1da3b0afccdf143e13d646b56
- https://git.kernel.org/stable/c/4c46beb807efcc93f5899ebe1f5958248eb296c6
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.